Mechanism for attaching sheets of card-clothing together and to the grinding-cylinder



2 Sheets-Sheet 1.

(No Model.)

W. HARRIS.

MECHANISM FOR ATTAGHING SHEETS 0P CARD CLOTHING TOGETHER AND'TO THEGRINDING CYLINDER. No. 413,445.

Patented Oct-22, 1889.

N. Perms. Photaliliwwapviur, Wnhirvglon B4 c,

(No Model.) 2 Shets-Shetfi.

. H I W. HARRIS. I

MECHANISM FOR ATTAUHING SHEETS 0F CARD CLOTHING TOGETHER AND TO THEGRINDING CYLINDER.

Patented Oct. 22, 1889. EE- .5.

l R INN I E w' Lb-Lsszes;

I UNITED STATES PATENT OFFICE.

WILLIAM HARRIS, OF AUBURN, MASSACHUSETTS.

MECHANISM FORATTACHING SHEETS 0F CARD-CLOTHING TOGETHER AND TO THEGRINDING-CYLINDER.

SPECIFICATION forming part of Letters Patent No. 413,445, dated October22, 1889.

Application filed May 20, 1889- Serial No. 311,483. (No model.)

To aZZ whom it may concern.-

Be it known that 1, WILLIAM HARRIS, of

Auburn, in the county of Worcester and Com-- ing drawings and theletters of reference marked thereon, forming a part of thisspecification, and in which Figure 1 represents a plan view of myfastening mechanism when applied to use, as will be hereinafter morefully described. Fig. 2 represents an end view of the parts shown inFig. 1, as hereinafter described. Fig. 3 represents, upon an enlargedscale to that shown in Figs. 1 and 2, a section of card-clothing on"each side of the tightening mechanism, a plan View, as will" behereinafter more fully described, the straps being shown attachedtoget-her. Fig. 4 represents a section on line a, Fig. 3, looking in thedirection'indicated by. the arrow, Fig. 3, before the straps arefastened together. Fig. 5 represents a section on line b, Fig. 8,looking in the direction indicated by the arrow, Fig. 8, the strapsbeing fastened together andto the cylinder. Fig. 6 represents a sectionon line 'c,'Fig. 3, as will be hereinafter more fully described.

To enable those skilled in the art to which my invention belongs to makeand use the same, I will now describe the invention more in detail.

It is desirable to grind the teeth of cardclothing before it is sold orsent away from the manufactory, and for several reasons, among which maybe mentioned the danger from fire when the teeth are not ground untilthe sheets have been secured to the cards in the mill; further, there isgreat loss of time when the first grinding takes place in the mill. Themodes heretofore in use have not proved free from serious objections;and itis the object of my present invention to improve and perfect themechanism employed in the process or method of preparing sheets ofcardclothing for grinding before the said sheets are attached to thecards, and which method forms the subject-matter of aseparateapplication for Letters Patent filed April 2, 1888,

claimed in this application, which is limited to the mechanical deviceshereinafter described. i g

In the drawings, the parts marked B are the sheets of leather, cloth, orother material, in which the teeth 01 are set in the usual andwell-known manner. ever, that each blank sheet or back B is strainedtaut between rigid jaws or clamps, and thus held until all the teeth insuch sheet have been set. Consequently the teeth all stand in a certainrelative position to each other, and it is desirable that when firstground they should be retained in such positions.

Heretofore it has been the practice in some factories for settingcard-teeth to sew the separate sheets to an endless belt of cloth orother flexible material and then run the same over cylinders whichsupported the same, while emery-wheels properly arranged and operatedground the teeth; but in this way the sheets were not held true andeven, consequently the teeth were left imperfect. In other cases thesheets have been fastened to acylinder by clamping devices fastened tothe cylinder, each sheet being fastened to the cylinder in anindependent manner, and which involved complicated mechanism that wasliable to get out of order, and, besides, the sheets were not held inthe same relative manner to insure the teeth in the proper and mostdesirable positions while being ground. Then, again, when the cylinderwhich supports the card-clothing while be.

ing ground is bored full of holes, a separate cylinder must be employedfor each width of sheet otherwise all the holes not used must be pluggedand smoothed off, or the backs of the teeth resting over such holes willbe pressed into the same, and these teeth will thus be unground, orground in an imperfect manner, besides being uneven. I

I11 the drawings only a portion of theslieets B are shown with teeth d,but it will be understood that the others also have teeth, those shownserving to illustrate my invention.

To fasten the sheets together so that each It may be stated, how-.

Serial No. 269,302, and is not, therefore,

' drawings.

sheet will support its respective teeth in the same relative position inwhich they were set, I have a clamping device consisting of a top metalclamp-piece C, which is a little longer than the sheet to be ground, andis concave on the under side, and is provided with clamping orside-holding jaws C e g, to act in combination with the underclampingpiece (1 which is provided with side clamping-wings f h, andthese parts when in use are held together by means of holding-screws CThe sides of the upper part of the clamping-piece O are made parallel toeach other,

and against which the'edges of two adjacent sheets B abut, and aresecurely held when screws 0 are in place, as indicated in the A set ofcard-clothing sheets B, as they come from the card-setting machine, arefastened together, a suitable table or platform being used, and eachsheet is held in the same position by its two sides or edges as it washeld in the jaws of the card-setting machine. This is an importantpoint, since the greatest success depends upon the sheets being held andfastened together and to the grinding-cylinder without twisting.

I will now describe the mechanism for fastening the sh ee'ts thusfastened together to the cylinder A preparatory to grinding the teeth ina uniform manner.

I have one set of clamping devices for clamping the first edge of thefirst sheet B, as shown on the right-hand end of each of the Figs. 3, 4,5, and 6, and to the left side of this clamping device is attached themetal tightening-strap F by means of two screws F F, which pass throughboth of the clampingpieces 0 and C The edges of jaw Cthe parts e andgare cut away for the reception of the end ofstrap F. (See Figs. 4 and 5of the drawings.) It will be seen that a part of the under side of jaw Oc g is cut away to receive the end of strap F, and when the first sheetB (shown on the right) is placed between the clamping-pieces O and 0pieces of leather of the same thickness as sheet B are placed betweenthe jaws on each side of the straps F, as indicated by dotted lines,Fig. 1, two straps F being used, and each strap is placed about one footfrom each end of the clamping devices. To the clamping device attachedto the last sheetB (shown on the left in Figs. 3, 4, and 5 of thedrawings) another set of straps E is attached, one of which is shownupon an enlarged scale in Figs. 3, 4, and 5 to what the same parts areshown in Figs. 1 and 2. Strap E is fastened to clamping-pieces O and Oby a single screw E. The under side of jaw C e g is cut away a littlemore to receive strap E, as seen at 1', than the same or correspondingparts are cut away, as seen at j,to receive the strap F, it beingdesirable to give strap E some play up and down. Pieces of leather areplaced between the clamping-pieces on each side of straps E -(see dottedlines, Fig. 1) when the last sheet B is attached, same as in the case ofthe attachment of the first sheet, asbefore stated, and by whicharrangement the clamping-pieces are kept true and even when screwedtogether to hold the first and last sheets. As the clamping devices 0and C when secured together are stiff and rigid, they hold all thecard-sheets in an even true relative position, no twisting of sheets orstrap F, as shown in Fig. 4, and a tighteninglever J, the upper end ofwhich is shown broken off in Fig. 4, is inserted through one of theslots H and its lower end entered into one of the holes I and strap Edrawn over strap F, and the operation repeated until the series ofsheets of card-clothing B are all drawn to the desired tautness, whenscrew M is inserted through a hole in the plate E and screwed into oneof the holes K in plate or strap F, wherebythe straps or plates E and Fwill be securely fastened together, and also to cylinder A, with theseries of sheets B of card-clothing, and all of which are now ready tobe ground by means of grinding-rolls made and operated in the well-knownmanner, and therefore no further description of the grinding operationis here necessary, it being understood that cylinder A is rotated bypower applied to its shaft A, which is also supported and rotated in thewell-known manner. rows indicate the direction in which the cylinder Aand its sheets of card-clothing move, also that of the grinding-rolls D,which grind the teeth cl.

It will be observed that the holes I on one side of holes K alternatewith the holes I on the other side of holes K, whereby atightening-lever J can be inserted on alternate sides of holes K, and agreat and Very even strain obtained on the strap or plate E and theseries of card-sheets B, screw'L holding the first set of clamps O 0'fast to cylinder A.

By having strap E attached to its clamp device 0 C loosely its outer endcan be raised up, as shown in Fig. 4, to allow lever J to be inserted inan inclined position, (see Fig. 4,) whereby a great leverage is obtainedin the tightening operation. Straps E and F may be made of any desiredlength, and more or less holes K and I may be formed in the strap F,and, if preferred, more than two slots II may be made in strap E. By myinvention there need be but two holes in the cylinder A, those for thescrews L, one for each strap F. If, therefore, a cylinder A is madelarge enough for a full set of card-sheets of the greatest width ofsheets used, the same cylinder can be employed for grinding all sheetsof less width, false pieces of leather'being put in to give the desiredlength to reach around the cylinder to enable the straps'E and Ft-o lapeach other to fasten, as shown in the drawings. The backs of all theteeth d Will always rest on the smooth surface of cylinderA during thegrinding operation.

The invention is simple and effective.

Having described one, good and practical Way for carrying out inysaidinvention, What I claim as new and of my invention, and desire to secureby Letters Patent, is

- 1. The combination, with a series of clamping-pieces O 0 provided withholding-jaws e g and clamping-wings f h, respectively, of a series ofsheets of card-clothing B, the sheets of card-clothing andclamping-pieces being arranged alternately and parallel to each otherand held securely in such relative positions by screws 03, substantiallyas and for the purposes described.

2. The combination of tightening-straps E and F, with their respectiveclamping-pieces poses set forth.

3. Clamp 0, having one side provided with jaws e g and the other sideprovided with recesses, in combination with straps E F, strap E beingprovided with slots H, and perforated for attachment to its clamp, andstrap F being provided with the series of holesI K, and withperforations for attachment to'its clamp 10 and 0 substantially as andfor the purand to the cylinder, substantially as described.

WILLIAM HARRIS.

VVitn esses:

THOS. H. DODGE, DAVID L. BRADT.

